Full
Outline
To achieve the safe and efficient mining of resources under fractured ore-rock conditions in the first mining area of a copper-gold mine, numerical simulation was used to optimize the process parameters of the drift section, the mining spacing of the panel, and the multi-layer collaborative mining interval of the upward drift filling mining method. The feasibility of the optimized parameters was verified through the field industrial test. The results show that the influence of drift width variation on the roof differs for different roof media. The drift section dimensions are determined to be 5 m×5 m, and the interlayer spacing of multi-layer collaborative mining should be not less than 20 m. A "mining one drift after every three drifts" scheme is implemented in the panel area, i.e., the spacing between simultaneously mined drifts in the panel is 15 m. The optimized process parameters were applied to the field industrial test, achieving safe, efficient, and economical mining under unstable ore and rock conditions, indicating that the optimized process parameters are feasible applied to the first mining area of the mine.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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